Microworld

world of amoeboid organisms

Menu
Menu

Raphidocystis  Penard, 1904 emend. Zlatogursky, 2018

Diagnosis: Centrohelids with monolayered plate-scales covering the cell surface. Plate-scales with a hollow inflected margin. Sometimes, trumpet-shaped or tubular spine-scales are present, forming an outer layer of coverings. At some life-cycle stages the siliceous scales are completely overwritten with organic spicules with some intermediate stages having a combination of siliceous spicules and scales.

References: Penard 1904, Nicholls and Dürrschmidt 1985, Mikrjukov 1996b, Zlatogursky 2018.

Type species: Raphidocystis lemani  (Penard, 1891) Penard, 1904.

  • Last updated January 31, 2021
Menu
Recent posts

Kibisidytes

October 16, 2021

K. marinus, after Jepps, 1934 Kibisidytes marinus Jepps, 1934 Diagnosis: Small amoeboid organism occurring in the sea, attached to the surface film or to some

Read More »

Phaeobola

October 1, 2021

P. aeris from Dumack et al., 2000 Phaeobola Dumack et al., 2000 Diagnosis: Cells roundish to oval shaped. Shell colorless to amber-colored, rough surface, few

Read More »

Rhizaspis armata

September 21, 2021

R. armata, 68 µm long, excl. spines – Laegieskamp Rhizaspis armata (Lauterborn, 1901) Dumack et al., 2021 Basionym: Pamphagus armatum Lauterborn, 1890 Diagnosis: Theca membranous,

Read More »

Rhizaspis spinosa

September 21, 2021

The original description with original drawings, Penard, 1890. Rhizaspis spinosa (Penard, 1890) Dumack et al., 2021 Basionym: Trinema spinosum Penard, 1890 Diagnosis: Theca membranous, ovoid

Read More »

Difflugia “pseudoclaviformis”

September 21, 2021

Difflugia “pseudoclaviformis”, front and side view, 424 µm Difflugia “pseudoclaviformis” Diagnosis: Shell pyriform, compressed, with a more or less pronounced aboral protuberance; shell composed of

Read More »

Difflugia from Lolo Pass

September 20, 2021

Shells 461-448 µm, stacked image. I found this large en remarkable shells in sediment of a small mountain lake near Lolo Pass, Montana USA. It differs

Read More »

Foraminifer drome

September 14, 2021

Unknown species, collected from the river Drôme, France, 2021 Unknown species September 2021, I found about ten specimens of an agglutinated foraminifer in a sample

Read More »

Cyclopyxis spec

August 6, 2021

Cyclopyxis spec., 168 µm Cyclopyxis spec. Diagnosis: Shell circular in ventral and dorsal view, more or less hemispherical in lateral view (height/diameter ≈ 0.5); lateral

Read More »

Difflugia fallax

August 4, 2021

Difflugia fallax, from Penard, 1902 Difflugia fallax Penard, 1890 Diagnosis: Shell hyaline or yellowish-greenish, black at low magnification, round in cross section, formed of a

Read More »